Processor	80486SX/80487SX/80486DX
Processor Speed	25/50MHz
Chip Set	UMC
Max. Onboard DRAM	64MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	220mm x 330mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Reset switch	J4
Speaker	J2	Turbo LED	J5
Turbo switch	J3	External battery	J6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select color	W1	closed
	Monitor type select monochrome	W1	open

DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(4) 256K x 9	NONE	NONE	NONE
2MB	(4) 256K x 9	(4) 256K x 9	NONE	NONE
3MB	(4) 256K x 9	(4) 256K x 9	(1) 256K x 36	NONE
4MB	(4) 256K x 9	(4) 256K x 9	(1) 256K x 36	(1) 256K x 36
4MB	(4) 1M x 9	NONE	NONE	NONE
5MB	(4) 256K x 9	(4) 1M x 9	NONE	NONE
8MB	(4) 1M x 9	(4) 1M x 9	NONE	NONE
12MB	(4) 1M x 9	(4) 1M x 9	(1) 1M x 36	NONE
16MB	(4) 1M x 9	(4) 1M x 9	(1) 1M x 36	(1) 1M x 36
16MB	(4) 4M x 9	NONE	NONE	NONE
20MB	(4) 1M x 9	(4) 4M x 9	NONE	NONE
32MB	(4) 4M x 9	(4) 4M x 9	NONE	NONE
48MB	(4) 4M x 9	(4) 4M x 9	(1) 4M x 36	NONE
64MB	(4) 4M x 9	(4) 4M x 9	(1) 4M x 36	(1) 4M x 36

SRAM JUMPER CONFIGURATION
Size	SW1/Switches 1-4	Jumper W6	Jumper W7	Jumper W8	Jumper W9
64KB	all switches open	pins 1 & 2	pins 1 & 2	open	pins 1 & 2
128KB	1&4 closed 2&3 open	pins 2 & 3	pins 1 & 2	pins 1 & 2	pins 2 & 3
256KB	all switches closed	pins 2 & 3	pins 2 & 3	pins 2 & 3	pins 1 & 2
Note:Pins designated should be in the closed position.

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG (U32)	TAG (U33)
64KB	(8) 8K x 8	Banks 0 & 1	(1) 16K x 4	(1) 8K x 8
128KB	(4) 32K x 8	Bank 0	(1) 16K x 4	(1) 32K x 8
256KB	(8) 32K x 8	Banks 0 & 1	(1) 16K x 4	(1) 32K x 8

CPU TYPE CONFIGURATION
CPU	Jumper W2	Jumper W3	Jumper W4
80486DX	open	pins 1 & 2 closed	pins 1 & 2 and 3 & 4 closed
80487SX	open	pins 2 & 3 closed	pins 1 & 2 and 3 & 4 closed
80486SX	closed	open	pins 2 & 3 closed